Fix a memory access problem identified by valgrind.
Fix a memory access problem identified by valgrind.

* subversion/libsvn_subr/path.c (svn_path_uri_decode): Allocate enough
  space for null terminator.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@842092 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,wbond/subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion